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Drag and drop is broken as of 14 hours ago. Here's the traceback from the core-drag-drop from http://www.polymer-project.org/components/core-drag-drop/demo.html and http://www.polymer-project.org/tools/designer:

Uncaught TypeError: undefined is not a function core-drag-drop.html:58
(anonymous function) core-drag-drop.html:58
Polymer.attached core-drag-drop.html:61
d.attachedCallback base.js:88
f.registerPrototype prototype.js:197
f.register prototype.js:26
d._register polymer-element.js:64
e.flush queue.js:100
e.ready queue.js:105
e.check queue.js:80
(anonymous function) queue.js:162
c HTMLImports.js:220
d HTMLImports.js:225
h HTMLImports.js:230
(anonymous function) HTMLImports.js:186
g HTMLImports.js:210
c HTMLImports.js:205

And points to this block of code:

attached: function() {
    var listen = function(event, handler) {
        PolymerGestures.addGesture(this.parentNode, event, this[handler].bind(this));
  }.bind(this);

a reference to bower.json seems to be missing. causing this error: GET http://localhost:8000/core-drag-drop/bower.json 404 (File not found) core-component-page.html:12

As the title described. the this.dragInfo:

listen('trackstart', 'trackStart');
listen('track', 'track');
listen('trackend', 'trackEnd');

has no hover target. So there's no way to make sure the element I will drop if I release my mouse here.

I found that global addEventListener('mousemove', ...) can do this and send a pull request. But I've no idea about the perfect way.

Thanks.

Hi !

In Firefox 32, I get an error :

TypeError: node.getBoundingClientRect is not a function

with the core-drag-drop demo , when I drop an "Hello World" element outside the DOM document, or outside the browser window.
I get a similar error in node-webkit 0.10.5 (chromium 35) :

TypeError: Cannot read property 'getBoundingClientRect' of null"

In the framed function, node seems to be null.

No problem in Chrome 38.

The avatar is wrongly positioned after scrolling the webpage:

Hi, guys!

I tested drag-drop in my Safari 8 and found non-smooth dragging. Mobile Safari has this problem too. http://www.youtube.com/watch?v=v9awse0vCKg&feature=youtu.be

So I think the problem is requestAnimationFrame behavior in Safari (for example http://stackoverflow.com/questions/27027914/css-translate3d-is-very-jumpy-on-safari-8). Is it possible to make polyfill for this case?